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Got an exciting idea for a mobile app and looking for a professional expert in React Native, Flutter, Mobile App Development, Android App Development, iOS Development, AI Mobile App Development, Hybrid Mobile App Development, Native App Development, or App Development? I am an experienced Mobile App Developer (𝟖+ 𝐲𝐞𝐚𝐫𝐬) specializing in building scalable, secure, and high-performance applications using React Native, Flutter, Kotlin, Android, and Swift, iOS development technologies. I develop modern Android apps, iOS apps, and cross-platform smartphone applications with clean UI, optimized architecture, and smooth performance. My expertise includes User Authentication, User Profile Creation, In-App Purchases, Chat & Messaging Software, and Mobile App Bug Fixing to ensure fully functional, stable, and production-ready mobile applications. I also provide complete Mobile App Development Consultation to help clients convert ideas into successful digital products. I have strong experience in AI Mobile App Development, Hybrid Mobile App Development, Native App Development, and App Development solutions for startups, enterprises, and businesses. I focus on building scalable and secure applications with modern mobile technologies. From mobile app design, development, bug fixing, performance optimization, to deployment, I provide complete end-to-end mobile app solutions. If you are looking for a reliable expert in Mobile App Development, Android App Development, iOS Development, or AI Mobile App Development, I can help bring your idea to life with scalable and production-ready solutions. 𝐈𝐧𝐝𝐮𝐬𝐭𝐫𝐢𝐞𝐬 & 𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 I have worked on a wide range of applications including: • Dating App Development • E-commerce App Development • Marketplace App Development • On-Demand Apps • FinTech Apps • Health & Fitness Apps • Social Networking Apps • SaaS Mobile Apps • Food Delivery Platforms • Taxi Booking Applications • AI-Based Mobile Applications • Chat & Messaging Applications 𝐖𝐡𝐚𝐭 𝐘𝐨𝐮 𝐆𝐞𝐭 𝐖𝐨𝐫𝐤𝐢𝐧𝐠 𝐖𝐢𝐭𝐡 𝐌𝐞 ✔ 8+ years of real-world mobile app development experience ✔ Clean, scalable, production-ready code ✔ Fast communication and reliable delivery ✔ Strong focus on business goals and user experience ✔ End-to-end support from idea to launch ✔ Long-term support for updates and scaling ✔ Clear development process with regular progress updates 📩 𝐒𝐞𝐧𝐝 𝐦𝐞 𝐲𝐨𝐮𝐫 𝐚𝐩𝐩 𝐢𝐝𝐞𝐚, feature list, or project requirements, and I’ll help you create a clear development roadmap, timeline, and strategy for launching your application successfully. Lucas 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐞𝐝 𝐒𝐤𝐢𝐥𝐥𝐬: Full Stack Developer | Expert Full Stack Developer | Full Stack Mobile App Developer | Full Stack AI Developer | Mobile Developer | React Native Developer | Flutter Developer | iOS Developer | Android App Developer | Mobile App Development | Mobile Application Developer | App Developer | Cross Platform Development | Hybrid App Development | AI App Developer | AI Mobile App Developer | Full Stack Mobile Developer | Mobile Software Engineer | Mobile App Consultation | IT Consultation | iOS App Development | Android App Development | React Native Mobile App Development | Flutter Mobile App Development | React Native | Flutter | Firebase | Dart | Flutter Firebase | React Native Firebase | Firebase Developer | API Integration | REST API Integration | Smartphone App Development | Mobile UI/UX | App Performance Optimization | MVP App Development | Marketplace App Development | E-commerce App Development | Startup App Developer | Real-Time App Development | Push Notification Integration | Payment Gateway Integration | Google Maps API Integration | Mobile App Maintenance | Scalable Mobile Apps | Custom Mobile App Development | Mobile App Design | User Authentication | In-App Purchases | User Profile Creation | Social Media Integration | Firebase Cloud Firestore | Python | Kotlin | Swift | Java | AI Chatbot Integration | AI Model Integration | AI Text-to-Speech | AI Text-to-Image | AI Audio Generator | AI Agent Development | Cloud Integration | Google Cloud Platform | GitHub | API Development | Stripe Integration | Chat & Messaging Apps | Community App Development | Health App Development | SaaS Development | Mobile App Bug Fix | React Native Expo | App Deployment | App Optimization | Software Configuration Management | User Experience Design | User Interface Design | Mobile UI Design | iPad App Development | iPhone App Development | Android App Development | International App Development | Ad Campaign Integration

I specialize in stabilizing and modernizing iOS codebases — crash recovery, legacy rewrites, architecture cleanup, and long-term system ownership. I've worked across production systems at enterprise scale. iOS Engineering — Swift, SwiftUI, UIKit, Objective-C, Combine, Swift Async/Await Architecture — MVVM, Clean Architecture, VIPER, Coordinators, Modular Systems, Dependency Injection, SOLID iOS Frameworks — CoreData, CoreLocation, CoreMotion, CoreImage, Vision Framework, BackgroundTasks, AVFoundation, HLS, User Notification (push notifications) UI & Animation — Lottie, Kingfisher, SDWebImage, Nuke, SnapKit, AVFoundation Concurrency & Stability — Swift Async/Await, Combine, crash recovery, performance optimization, memory management Data Persistence — SwiftData, CoreData, SQLite, KeychainAccess Backend & Auth SDKs — Firebase, Supabase Swift, REST APIs AI Integration — OpenAI SDK, OpenRouter, vector embeddings (pgvector), NestJS/TypeScript backends CI/CD & Tooling — Fastlane, GitFlow, Swift Package Manager, CocoaPods, Carthage, SwiftLint, Xcode Cloud Analytics & Observability — Firebase Analytics, Sentry, crash reporting, performance monitoring App Store & Compliance — App Store Connect, App Store submission, review guidelines, rejection resolution, privacy compliance Accessibility — VoiceOver, WCAG, EAA compliance, full accessibility audits Databases — PostgreSQL, MySQL, MongoDB, SQLite, CoreData Testing — XCTest, unit testing, integration testing I can also assist you with app distribution, marketing, and launch using: — App Store Connect — Apple Developer Platform I work best on long-term contracts where I can own the system, not just patch it. If your iOS codebase is getting harder to maintain, slower to ship, or failing under growth — that's exactly the problem I solve. Send me a message — happy to jump on a call and go over the details.

I am an iOS developer with 6 years of hands-on experience in building dynamic and user-friendly applications. My expertise lies in leveraging the latest technologies and frameworks to deliver high-quality iOS solutions that enhance user experiences and drive engagement. I have successfully contributed to projects across various industries, collaborating with teams to implement innovative features and optimize app performance. If you need a proactive developer who can seamlessly integrate your ideas into a polished app, I can help. Let's connect to discuss how I can bring your vision to life and ensure your project stands out in the competitive mobile landscape.

Ever felt swamped in the vast sea of mobile app developers? It's frustrating when deliveries are late, functionalities go missing, and codes resemble intricate mazes. Trust me, you aren't the only one navigating these waters. Many collaborators have shared stories of past stumbles. But here's a ray of hope: we can steer towards a brighter horizon. With a decade under my belt and a heart full of passion, I aim to rewrite these narratives. Some Milestones: ⭐ Spearheaded development for Fitbit, which impressively raised $66M. ⭐ Had the honor of collaborating with Pure, Powerdot, and Xsat, all of which celebrated significant investment milestones. ⭐ Steered numerous projects using cutting-edge technologies, simplifying and accelerating the development trajectory. ⭐ Seamlessly merged the principles of Agile & Scrum, fostering flexibility and quick turnarounds. Let me introduce myself I'm Sergey, possibly your next Lead Android/iOS Developer. The past decade has been an exhilarating roller-coaster, packed with invaluable experiences, challenges, and a string of successful projects. I've lent my expertise to startups, and industry giants, helping them manifest their mobile app dreams. Why do they choose me? ✅ A relentless drive to craft projects that stand out and garner rave reviews. ✅ Undying support post-project because our relationship isn't just transactional. ✅ A rich toolkit encompassing Kotlin, Swift, and trailblazing frameworks like Jetpack Compose & SwiftUI. ✅ Agility in approach with a deep-rooted foundation in OOP & Functional programming styles. My Array of Specialties: 📱 Leading mobile development with Kotlin, Swift, Java. 🚀 Cross-platform mobile app development using Flutter, React Native. 🌐 Backend prowess with Firebase and Node.js. 💻 Architectural excellence with MVVM, MVP. 🔄 Transparent updates and effortless communication, ensuring you're always in the loop. Build your app faster with AI + Human expertise Every AI-generated snippet is reviewed and adapted by me, while complex or safety-critical parts are designed and implemented manually. Routine work gets automated, so I can stay focused on product value. Result: shorter cycles, cleaner code, and reliably on-time delivery. Used in my workflow (hands-on): ✅ AI Coding Assistants & IDEs: GitHub Copilot, Cursor, Replit, Amazon Q Developer, Lovable ✅ Foundation Models (LLMs): Claude, Gemini, GPT, DeepSeek, Llama, LLM (generic) ✅ Cloud AI Platforms: AWS Bedrock, Azure (incl. Azure OpenAI), Vertex AI ✅ Local Inference Runtimes: Ollama ✅ Agent/Orchestration Frameworks: LangChain, Semantic Kernel, AutoGen 📈 I'm an AI business transformation engineer with a strong passion for mathematical models and artificial intelligence that drive business success. Building upon a solid foundation in Python and classic machine learning, I specialize in designing and implementing AI solutions that align with your business objectives. 🧠 Business-centric AI solutions with low-code prototyping My expertise lies in deploying and integrating Large Language Models (LLMs) into business workflows. Recognizing that each business has unique needs, I adeptly customize AI solutions to meet specific requirements. Utilizing low-code platforms like n8n and Langflow, I rapidly prototype AI pipelines, enabling quick iterations and seamless integration into existing systems. For more complex scenarios and product-quality solutions, I leverage Python frameworks such as LangGraph to build stateful, multi-agent LLM applications, ensuring robust and scalable AI solutions. 🤝 Collaborative approach to AI integration I believe in a collaborative approach, working closely with clients and their teams to understand challenges and goals. This ensures that the AI solutions developed are aligned with your vision and provide tangible benefits. Clear communication and transparency are paramount throughout the project lifecycle, keeping you informed and engaged at every step. 🌟 Proven track record of delivering tailored AI solutions Clients consistently commend my technical expertise, professionalism, and ability to deliver efficient, high-quality solutions tailored to their needs. From flawless automation development and AI consultation to advanced script adjustments and LLM integrations, I have a proven track record of exceeding expectations. Whether it's enhancing e-commerce operations, building intelligent systems, or streamlining workflows, I am proud to be a trusted partner in driving success. ⚙️ Technologies and tools: Programming: Python (NumPy, Pandas, Scikit-learn, PyTorch, TensorFlow), JavaScript (Google Apps Script) Large Language Models: Lan In a nutshell? I value transparency, efficiency, and making a tangible difference. It's not just about crafting any mobile app, but sculpting one that resonates, scales, and surpasses the norm. Ready to embark on an extraordinary journey? Let's unite over a virtual coffee and set the wheels in motion for your next mobile marvel!

Dear client, I am a web developer with 5 years of experience. I'm more than happy to help you with: - HTML5 - CSS3 (w/ some Bootstrap & Tailwind) - JavaScript / TypeScript - NodeJs - React / Angular / jQuery - MySQL - Redis - Linux environments (expert debian user) - No code / Low code environments (eg: Tadabase, Bubble, Webflow) - Automation (eg: Zapier, Integromat) - Web Scraping (w/ Puppeteer) - AWS basics - Confluence / Jira / Zendesk - Git (CLI, and GitHub) - Chrome DevTools - Technical support - Virtual assistance / Data entry / Research / Copywriting My languages: - English (C1) - Spanish (Native) I learn quickly and deliver all projects/tasks in an organized, fast, and efficient way.

iOS Engineer specialized in building scalable, high-quality mobile applications using Swift, SwiftUI, and Clean Architecture. I have experience working on high-traffic apps, delivering robust features for millions of users, particularly in e-commerce and booking platforms. I focus on writing clean, maintainable code and creating seamless user experiences, combining strong technical foundations (MVVM, SOLID, testing) with attention to detail in UI/UX. What I can help you with: * iOS app development (SwiftUI & UIKit) * Architecture design (MVVM, Clean Architecture) * API integrations (REST, Firebase) * Performance optimization & scalable features * Unit & UI testing * Pixel-perfect UI implementation from Figma I’ve worked on complex flows like checkout systems, onboarding experiences, and feature rollout strategies using tools like Firebase Remote Config. Also, I’m a university lecturer, so I bring strong communication skills and a clear, structured approach to every project. If you’re looking for someone reliable who can deliver production-ready iOS features with minimal supervision, let’s work together.